This is one of two diffusors that simply snap onto the silver 5" reflectors that we have made for about 45 years. This version is the more clear diffusor that will lose only 1/3 of an f-stop as it slightly softens and diffuses the light going through it.
Some UV light is absorbed as well so the light is softer and warmer than when direct from the reflector.
The ARST is the normal two position Reflector that we include with most all of our Flash Heads when new. It has a hammer dimple finish on a parabolic shape that is award winning in its design in relationship to the flashtube. When it is sitting in the forward position it is normal coverage and when it drops back into the two notches, it broadcasts a wider angle.
The set of two switch caps include a red and white one for the top of the Lumedyne Power Packs.
Using the switch covers helps extend the lifespan of the switch by keeping dust and debris out of it.